Quartz-mill.



No. 802,787. PATENTED 001? 24, 1905. R.A.VAUGHN.

QUARTZ MILL.

APPLICATION FILED SEPT. 22, 1904.

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No. 802,787. PATENTED OCT. 24, 1905. B. A. VAUGHN. QUARTZ MILL.

APPLICATION FILED SEPT. 22, 1904.

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UNTTED STATES PATENT OFFICE.

QUARTZ-"NULL.

Specification of Letters Patent.

Patented Oct. 24:, 1905.

Application filed September 22, 1904. Serial No. 225,443.

To all], whom it may concern:

Be it known that 1, ROBERT A. VAUGHN, a citizen of the United States, and a resident of Ballard, in the county of King and State of Washington, have invented a new and Improved Quartzdvlill, of which the following is a full, clear, and exact description.

My invention relates to pulverizing apparatus, and more particularly to that adapted for the reduction of ore. Its principal objects are to provide a readily-portable mill which will be simple and effective in operation.

It consists in the various features and combinations hereinafter described and more particularly claimed.

Reference is tobe had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a central vertical section through one embodiment of my invention on the line 1 1 of Fig. 2. Fig. 2 is a broken top plan view thereof, and Fig. 3 is a detail showing the relation between the end of a delivery-chute and its associated roll.

F designates a frame, which may conveniently consist of uprights 10, lower connecting members 11, and upper members 12. Upon the lower members is supported an annular mortar 13, which is preferably formed in a number of sections having at their adjacent ends lugs 14, through which bolts may be passed to secure them together. The mortarsections may be attached to the frame by bolts extending through bottom flanges 15, and within the mortar fits a die 16, preferably consisting of sections corresponding in number to those of the mortar. This die is provided with an annular V-shaped groove. At the inner side of the mortar is, an annular plate 17, which maybe seated within a recess and serve to prevent the overflow of material. At the outside of the mortar is a correspond ing recess situated in a lower plane than that of the interior, and in this last-named recess is located a sectional screen 18, which may be of any desired mesh. It may be retained within the recess by a hoop 18, which may This screen is shown as bent at its upper edge at 19 to form a channel through which passes a sectional wire 20, the ends of which, at the junctures between the screen-sections. may enter the ends of the channels in the adjoining sections to maintain them in their true relation. Outside the screen is shown a flange 20, which may serve to direct the discharge through the screen to a suitable launder. (Not illustrated.)

Mounted upon the lower members of the frame is a suitable support 21, which furnishes a step-bearing for a substantially vertical shaft 22, having its upper end rotatable in a spider 23, secured to the members 12 of the frame. WVithin the step is located aplate 24, with which the end of the shaft contacts, this plate being supported by a screw 25, threaded through the bottom of the step. By turning this screw in one direction or the other the shaft may be raised or lowered for the purposes to be hereinafter stated. The shaft 22 may be rotated by a bevel-gear 26, which is secured thereon, while arelative longitudinal movement is permitted by keys 27. With this gear 26 meshes a similar gear 28, fixed upon a horizontal shaft 29, suitably journaled in the frame and having a pulley 30, by which it may be rotated from any desired source of power. Between the pulley and shaft 29 may be interposed a clutch 31, by which the mill may be thrown into or out of operation.

. Secured upon the shaft 22 by set-screws 32 or the like is shown a collar 33, upon which rests a head conveniently made up of independent blocks 34 34, keyed at 35 for longitudinal movement. Into recesses between the blocks extend substantially horizontal arms 36, they being clamped in place by bolts 37, extending vertically through the blocks. The

outer ends of the arms may be connected bya ring 38, and upon the upper faces of the arms is shown a ring 39, conveniently of angle-iron. Below the collar 33 and separated therefrom by a suitable distance is a second collar 40, fixed to the shaft by set-screws 41. Upon this collar is supported a head, here shown as consisting of an upper block 42 and lower blocks 43 43, they all beingdrawn together by through-bolts 43. The block 42 and the adjacent block 43 are oppositely recessed to receive the ends of arms or braces 44, which are connected to the ring 38 beneath the ends of the arms 36. These connected arms and the rings constitute a truss frame or carriage. Secured upon this rotatable frame beneath the ends of the arms 36 are hangers 45, in hearings in which and in opposite bearings situated between the blocks 43 rotate shafts 46, which are also revoluble in the rotation of the frame. The hangers may he stayed by a connecting-ring 45*, se-

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cured to their outer faces and conveniently consisting of channel-iron. Fast upon each shaft is a cylindrical core 47, having a suitable number of transverse keyways, With which register opposite keyways formed in shells or shoes 48. These keyways receive keys 49 to secure the shoes upon the cores, these together furnishing pulveriZing-rolls. The rolls are provided with inclined faces 50 50, which are situated at such an angle as to conform to the inclined groove in the die, the inner, 50, of these being of greatest extent.

Above the roll-frame a collar 51 is secured to the shaft and has resting upon it a feed receptacle 52, which is supported at its upper end by a spider 53, keyed to the shaft. Above this receptacle, mounted upon the frame F, is a feed-hopper 54, located above the spider 23, while between this hopper and the receptacle is an intermediate or delivery funnel 55, which may be retained in place by a flange 55, engaging the stationary frame. Within the receptacle is a central frustoconical Wall, which directs the introduced material to the delivery-chutes 56, extending from openings in the bottom of the receptacle to the front of each roll and inner side of the die and being supported upon the ring 39. Each of these chutes is shown as provided with a contracted outlet 57, which directs the dislcharge at the extreme inner edge of the ro In use the relation between the pulverizingrolls and the die is adjusted, by means of the screw in the step, until the space between them will give substantially the desired degree of reduction. The ore or other material, commingled with water, is introduced through the feed-hopper and passing into the rotatable feed-receptacle is delivered by the chutes adjacent to the forward inner face of each roll, these rolls being revolved over the die at the desired speed. As the feed of the material progresses the pulp will rise in the mortar until it flows through the screen, carrying with it the material which has been reduced to the requisite fineness.

When it is desired to clean up the mill, the screens may be removed and the vertical shaft raised to its fullest extent by the screw in the step, thus giving access to the die, which, together with the roll-shoes, may be removed and renewed.

It will be seen that in my improved mill the reduction is secured effectively and without complication and that the parts when worn out may be readily replaced at a comparatively small expense. A considerable area of screen-surface is presented which does not become easily clogged and furnishes a discharge for a large output. The frame supports the rolls rigidly and in such a manner as to introduce but a minimum of wear, and therefore require but little lubricant, which when used freely has a bad efiect upon the pulp in interfering with the action of mercury upon it. The form of the active surface of the die and the cooperating rolls is such that they will wear uniformly, being less liable to get out of true and producing more grinding effect upon the material.

Having thus described my invention, Iclaim as new and desire to secure by Letters Patent 1. The combination with a mortar, of a rotatable shaft, separated heads rotatable with the shaft and comprising independent blocks, arms extending between the blocks, means for connecting the arms at their outer ends, hangers fixed to the arms at their junctures with the connecting means, shafts journaled in the hangers and in one of the heads, and rolls mounted upon the shafts and operating within the mortar.

2. The combination with a sectional mortar having an interior recess, of opposed lugs for connecting the sections, a sectional screen seated in the recess, said screen having a bent upper edge furnishing a channel, a sectional wire extending through the channel and joining the screens, and a hook engaging the screen within the recess.

In testimony whereofI have signed my name to this specification in the presence of two subscribing witnesses.

ROBERT A. VAUGHN.

WVitnesses:

ALFRED E. PARKER, M. F. PERRY. 

